Builders · Caerphilly
Builders in Caerphilly
Extensions, loft conversions, renovations, new builds and outdoor work for homes in Caerphilly and the villages around the basin.
Building work across the Caerphilly basin
We take on building work of every size in Caerphilly, from the streets around the castle to Bedwas, Trethomas, Llanbradach and the Aber Valley. The town’s houses span a century and a half, and each generation of them needs something different from a builder.
Our team is professionally trained, fully licensed and insured, and uses top-quality materials on every project. We offer a free initial consultation, and a competitively priced, no-obligation quote before any work is agreed.
- Extensions
- Loft & garage conversions
- Renovations
- New builds
- Design & build
- Patios & driveways
- Maintenance & repairs
What we build in Caerphilly
The first three have pages written for Caerphilly’s houses. The others are described in full on our service pages.
House extensions
Rear extensions on stone terraces, side extensions on estate semis and rooms over garages.
House extensions in CaerphillyLoft conversions
Dormer, hip-to-gable and rooflight conversions, where the roof has the height for one.
Loft conversions in CaerphillyRenovations & refurbishments
Older terraces brought up to date, and tired kitchens, bathrooms and floors replaced.
Renovations in CaerphillyNew builds
Homes, annexes and outbuildings taken from the foundations to handover.
About our new buildsPatios & driveways
Paving, steps, drainage and the retaining walls a sloping garden needs.
About our outdoor workMaintenance & repairs
Brickwork, pointing, rendering and roofing, done properly the first time.
About our repairs
Local knowledge
Building in Caerphilly: what to know
Planning applications are decided by Caerphilly County Borough Council, under the Welsh planning rules. Building regulations are a separate approval, which we arrange alongside the work.
Caerphilly sits on the South Wales coalfield, and collieries once ringed the basin. Before designing any new foundations we obtain a mining report for the plot, and in some locations the planning application has to include a coal mining risk assessment. In most cases the report simply confirms that ordinary foundations will do, but it has to be checked first.
- Planning authority
- Caerphilly County Borough Council
- Our base
- Llandough, by way of Cardiff and the A470
- Local factor
- Former mining ground
Work from our gallery
Structure, interiors and the ground outside.
Two-storey extension at shell stage 
Navy kitchen with a stone worktop 
Large-format porcelain paving
Why choose Orange Stone Construction
We offer more than construction services: we offer peace of mind, from the first conversation to the day the work is handed over.
Fully licensed & insured
Your project is in safe and professional hands, with the cover to prove it.
Free consultation & quote
A free initial consultation, then a competitively priced quote with no obligation.
On time and within budget
The price and the programme are agreed before we start, and we keep to both.
Professionally trained
Qualified tradespeople and top-quality materials on every stage of the work.
Where we work in Caerphilly
We reach Caerphilly from our base in Llandough by way of Cardiff and the A470.
- Penyrheol
- Trecenydd
- Energlyn
- Churchill Park
- Castle View
- Watford
- Bedwas
- Trethomas
- Machen
- Llanbradach
- Abertridwr
- Senghenydd
FAQs
Builders in Caerphilly: your questions
Anything else you want to know, call 029 2264 2498 and ask — we would rather have the conversation than have you guess.
Yes. We are based in Llandough, on the edge of Cardiff, and cover Caerphilly along with Bedwas, Trethomas, Machen, Llanbradach, Abertridwr and Senghenydd.
Yes. A rebuilt wall or a single room is as welcome as an extension. If a job is not practical for us to take on at that distance, we will say so straight away.
Because old coal workings can affect how foundations are designed, and Caerphilly has a long mining history. The report shows what is recorded beneath the plot. It is inexpensive, quick to obtain, and far better read before the design is fixed than after.
Yes, we are fully licensed and insured, giving you peace of mind that your project is in safe and professional hands.
Free, no-obligation quote
Tell us about your project
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- Your project
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